#include <stdio.h>

#define OPTION1 1
#define OPTION2 (1<<1) 
#define OPTION3 (1<<2)
#define OPTION4 (1<<3)

void choice(int options)
{
    if(options&OPTION1) printf("OPTION1\n");
    if(options&OPTION2) printf("OPTION2\n");
    if(options&OPTION3) printf("OPTION3\n");
    if(options&OPTION4) printf("OPTION4\n");
    printf("\n");
}

int main()
{
    choice(OPTION1);
    choice(OPTION2|OPTION3);
    choice(OPTION3|OPTION4);
    choice(OPTION1|OPTION2|OPTION3|OPTION4);
    return 0;
}
